CSS Quick Reference is a free educational app designed specifically for iPhone and iPod touch users. Developed by Flight-Sheets.com, this app provides convenient access to all of the W3C's Cascading Style Sheets (CSS) properties, pseudo-classes, and pseudo-elements. It offers a comprehensive guide to CSS syntax, including the equivalent JavaScript syntax for each property.

With CSS Quick Reference, users can easily explore the possible values and usage notes for each CSS property. The app also includes fully rendered sample code, allowing HTML or CSS developers to visualize the appearance of their code changes without the need for a desktop-based web development environment.

One of the standout features of CSS Quick Reference is its built-in color picker tool. This tool provides CSS color values in both RGB and hex formats. Users can select CSS color names, CSS Web Safe Color hex or RFB values, or set discreet values themselves to obtain accurate color representations.

Whether you're a beginner learning CSS or an experienced developer in need of a quick reference, CSS Quick Reference is a valuable tool that provides easy access to essential CSS information on the go.